Revision anterior cruciate ligament (ACL) surgery is often complicated by tunnel malposition and widening. Several authors report using bioabsorbable interference screws to fill defects. Subsequently, new tunnels are drilled in the anatomic position through both the native bone and the filler screw. Despite their common use, there is no biomechanical analysis available to support the use of such a construct. We used 30 porcine legs divided into 3 groups. Group I had native ACL fixation with 8-mm composite interference screws made from ß–TCP (beta-TriCalcium Phosphate) and PLGA (poly [L-lactide, co-glycolide]). Groups II and III had bone defects created and subsequently filled with 12mm ß-TCP/PLGA screws. Bone tunnels were subsequently drilled through the filler screw and surrounding bone, and the patellar plug was inserted. Group II had 8-mm fixation screws on the side opposite the filler screw, while Group III had the fixation screw between. The construct was loaded at 0.2 mm/s, with the vector in line with the tunnel. Force to failure, stiffness, and mode of failure were recorded. Average pullout strength for groups I, II, and III was 626, 652, and 719 N respectively (p=0.328). Average stiffness of the construct in groups I, II, and III was 71.4, 84.1, and 82.0 N/mm respectively. Groups II and III were significantly stiffer than group I (p=0.026). Mode of failure was predominantly by screw-plug pullout in groups I (7/10) and II (7/10). No bone plugs broke in either groups I or II. Group III failed by plug breakage (4/10), plug pullout (3/10), or screw-plug pullout (3/10). Drilling through ß-TCP/PLGA screws and fixing bone plugs with another screw provides adequate fixation strength in ACL revision surgery. This may allow for single stage revision for tunnel malposition and widening, thus avoiding 2-stage revisions.